Bioactive trace metals and their isotopes as paleoproductivity proxies: An assessment using GEOTRACES‐era data
Phytoplankton productivity and export sequester climatically significant quantities of
atmospheric carbon dioxide as particulate organic carbon through a suite of processes …
atmospheric carbon dioxide as particulate organic carbon through a suite of processes …
Chromium isotope geochemistry
L Qin, X Wang - Reviews in Mineralogy and …, 2017 - pubs.geoscienceworld.org
Chromium consists of four stable isotopes (50 Cr, 52 Cr, 53 Cr and 54 Cr) with natural
abundances of 4.35%, 83.79%, 9.50% and 2.36%, respectively (Rossman and Taylor 1998) …
abundances of 4.35%, 83.79%, 9.50% and 2.36%, respectively (Rossman and Taylor 1998) …
[HTML][HTML] Highly fractionated chromium isotopes in Mesoproterozoic-aged shales and atmospheric oxygen
The history of atmospheric oxygen through the Mesoproterozoic Era is uncertain, but may
have played a role in the timing of major evolutionary developments among eukaryotes …
have played a role in the timing of major evolutionary developments among eukaryotes …
Enrichment and speciation of chromium during basalt weathering: Insights from variably weathered profiles in the Leizhou Peninsula, South China
SS Sun, M Ao, KR Geng, JQ Chen, JJ Li… - Science of the Total …, 2022 - Elsevier
Basalt-derived soils are widespread worldwide. Such soils contain high levels of heavy
metals like chromium (Cr), which is a serious environmental concern. However, little is …
metals like chromium (Cr), which is a serious environmental concern. However, little is …
Modern rather than Mesoarchaean oxidative weathering responsible for the heavy stable Cr isotopic signatures of the 2.95 Ga old Ijzermijn iron formation (South …
Previously reported stable Cr isotopic fractionation in Archaean paleosols and iron
formations (IFs) have been interpreted as a signature of oxidative weathering of Cr (III) to Cr …
formations (IFs) have been interpreted as a signature of oxidative weathering of Cr (III) to Cr …
[HTML][HTML] Redox-independent chromium isotope fractionation induced by ligand-promoted dissolution
EM Saad, X Wang, NJ Planavsky, CT Reinhard… - nature …, 2017 - nature.com
The chromium (Cr) isotope system has emerged as a potential proxy for tracing the Earth's
atmospheric evolution based on a redox-dependent framework for Cr mobilization and …
atmospheric evolution based on a redox-dependent framework for Cr mobilization and …
[HTML][HTML] Marine microbial Mn (II) oxidation mediates Cr (III) oxidation and isotope fractionation
The stable chromium (Cr) isotope system has been used extensively over the past decade
as a paleoredox proxy. The prevailing view has been that Cr oxidation is essentially limited …
as a paleoredox proxy. The prevailing view has been that Cr oxidation is essentially limited …
Biogeochemical cycle of chromium isotopes at the modern Earth's surface and its applications as a paleo-environment proxy
Chromium (Cr) is a redox-sensitive metal element with two natural oxidation states,
commonly as the soluble Cr (VI) oxyanion (CrO 4 2− or HCrO 4−) and the insoluble Cr (III) …
commonly as the soluble Cr (VI) oxyanion (CrO 4 2− or HCrO 4−) and the insoluble Cr (III) …
Using stable isotope fractionation factors to identify Cr (VI) reduction pathways: Metal-mineral-microbe interactions
Microbes interact with metals and minerals in the environment altering their physical and
chemical states, whilst in turn metals and minerals impact on microbial growth, activity and …
chemical states, whilst in turn metals and minerals impact on microbial growth, activity and …
[HTML][HTML] Chromium biogeochemistry and stable isotope distribution in the Southern Ocean
Despite the potential of stable chromium (Cr) isotope compositions as a proxy for past
changes in oceanic redox conditions, a detailed understanding of the processes that govern …
changes in oceanic redox conditions, a detailed understanding of the processes that govern …